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EP0753533B1 - Procede de production de poudre fine de fibroine - Google Patents

Procede de production de poudre fine de fibroine Download PDF

Info

Publication number
EP0753533B1
EP0753533B1 EP96901128A EP96901128A EP0753533B1 EP 0753533 B1 EP0753533 B1 EP 0753533B1 EP 96901128 A EP96901128 A EP 96901128A EP 96901128 A EP96901128 A EP 96901128A EP 0753533 B1 EP0753533 B1 EP 0753533B1
Authority
EP
European Patent Office
Prior art keywords
silk
substance
aqueous solution
silk substance
alkaline aqueous
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP96901128A
Other languages
German (de)
English (en)
Other versions
EP0753533A4 (fr
EP0753533A1 (fr
Inventor
Kozo Tsubouchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
National Institute of Agrobiological Sciences
Original Assignee
National Institute of Agrobiological Sciences
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by National Institute of Agrobiological Sciences filed Critical National Institute of Agrobiological Sciences
Publication of EP0753533A1 publication Critical patent/EP0753533A1/fr
Publication of EP0753533A4 publication Critical patent/EP0753533A4/fr
Application granted granted Critical
Publication of EP0753533B1 publication Critical patent/EP0753533B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/12—Powdering or granulating
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08H—DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS
    • C08H1/00—Macromolecular products derived from proteins
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2389/00—Characterised by the use of proteins; Derivatives thereof

Definitions

  • Fine powder of silk fibroin is useful as an additive to food products, beverages and cosmetic products.
  • Previously fine powder of silk fibroin has been prepared by dissolving a silk substance in an aqueous solution containing a neutral salt, removing the neutral salt from the solution to yield an aqueous fibroin solution, adding a precipitating agent to the resulting aqueous solution to cause the silk fibroin to precipitate therein, and separating the precipitate from the solution and drying the precipitate or lyophilizing the aqueous solution, thereby yielding fine powder of silk fibroin.
  • a silk substance cannot be pulverized into finely divided crystalline powder with high efficiency by mechanically dividing the silk substance directly into fine powder because the silk substance is so high in mechanical strength that it is very hard to divide it into fine powder.
  • the present invention provides a process for the preparation of fine powder of silk fibroin, in which a silk substance is contacted with an alkaline aqueous solution at a temperature of 95°C or higher to degrade the strength of the silk substance, the resulting silk substance is then subjected to dealkalinization and drying, and the resulting dried silk substance is thereafter finely pulverized, characterised in that the contacting of the silk substance with the alkaline aqueous solution is carried out by filling the silk substance in a bag made of a cloth-like material having reticulate fine gaps and immersing the silk substance-containing bag in the alkaline aqueous solution.
  • the silk substance to be used for the present invention may include, for example, cocoons, cocoon thread, silk yarn, silk cloth and waste.
  • the process according to the present invention is preferably carried out first by treating a silk substance by bringing it into contact with an alkaline aqueous solution at a temperature of 95 °C or higher, preferably approximately 100 °C.
  • an alkaline substance for the alkaline aqueous solution there may be employed sodium carbonate, potassium carbonate, sodium hydroxide, potassium hydroxide or the like.
  • the extent of alkalinity of the alkaline aqueous solution may be pH 11.5 or higher, preferably pH 12 or higher.
  • the treatment of the silk substance with the alkaline aqueous solution may be carried out by immersing the silk substance in the alkaline aqueous solution.
  • the period of time (treatment time) during which the silk substance is kept in contact with the alkaline aqueous solution is a period of time long enough to cause the strength of the silk substance, whichever threads produced by sericulture or wild silkworms, to deteriorate to such a suitable extent to which the silk substance can be pulverized into finely divided powder.
  • treatment time a period of time long enough to cause the strength of the silk substance, whichever threads produced by sericulture or wild silkworms, to deteriorate to such a suitable extent to which the silk substance can be pulverized into finely divided powder.
  • it is such that they may come in contact with the alkaline aqueous solution until their tensile strength becomes approximately 0.05 g/d or less.
  • the treatment time may be in the range of from 1 to 4 hours; however, additional 2 or 3 hours or longer hours are required when the raw silk thread is large in fineness or when attachment of siren can be recognized thereon or when a silk substance such as wild silk thread is difficult to deteriorate.
  • the specific period of time required for allowing the silk substance to come in contact with the alkaline aqueous solution can be determined readily by a simple preliminary experiment for investigating the relationship between the readiness of pulverizing the silk substance with its strength deteriorated after the alkali treatment and the period of time during which the silk substance comes in contact with the alkaline aqueous solution.
  • the silk substance treated with the alkaline aqueous solution after separation from the alkaline aqueous solution, is washed to remove alkaline substance attached thereto with water followed by drying,
  • the silk substance is pulverized into finely divided powder in a manner as will be described hereinafter.
  • the pulverization of the silk substance into finely divided powder can be conducted by a general pulverization technique, it is preferred to divide it into fine powder by a two-step process in which the first step comprises dividing the silk substance into coarse powder and the second step comprises dividing it into fine powder.
  • the pulverization of the silk substance into coarsely divided powder may be effected so as to yield coarsely divided powder having an average particle size ranging from approximately 15 to 30 microns, and the pulverization thereof into finely divided powder may preferably be effected so as to yield finely divided powder having an average particle size ranging from approximately 3 to 6 microns.
  • the cloth material constituting the bag there may be used a woven or non-woven cloth made of alkali-resist fibers.
  • alkali-resist fibers there may be mentioned cotton fibers, synthetic resin fibers and so on.
  • the dimension of the fine gaps may appropriately be determined in accordance with the dimension of the silk substance to be removed and it may generally be set to be small enough to allow only the fine silk substances having the size of 1 micron or smaller to pass wherethrough in the alkaline aqueous solution.
  • raw silk yarn having approximately 30 d (deniers) as a sample
  • 1 part by weight of the raw silk yarn was immersed in an alkaline aqueous solution consisting of 1 part by weight of sodium carbonate and 30 parts by weight of water and then boiled.
  • the sample raw silk yarn lost its weight as time went by and the weight of the silk yarn reduced by approximately 10% by the treatment for 40 minutes and by approximately 16% by the treatment for 1 hour.
  • the raw silk yarn treated in the manner as described hereinabove was then washed with water and subjected to dewatering four times in order to remove alkali, followed by drying at room temperature.
  • the fine powder of the silk fibroin was then measured by a polarization microscope and it was found to have a birefringence in the range of from 4.0 x 10 -3 to 5.0 x 10 -3 .
  • This birefringence is substantially equal to that of silk yarn fibroin having a birefringence of 5.2 x 10-3. Therefore, it can be thought that the orientation of fibroin molecules in finely powdery form is equal to that of the silk yarn fibroin. Further, this is supported by a X-ray diffraction photograph of the fine powder of the silk fibroin and it was found to show a beta (b) type that was equal to that of silk yarn.
  • the raw silk yarn used as a raw material provided fine powder of silk fibroin at a yield rate as high as 70% to 60% by the alkali treatment for about 2 to 3 hours.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biochemistry (AREA)
  • Materials Engineering (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Peptides Or Proteins (AREA)
  • Cosmetics (AREA)

Abstract

Cette invention concerne un procédé présentant des avantages sur le plan industriel, permettant de produire une poudre fine et cristalline de fibroïne à partir de substances à base de soie. Ce procédé consiste à mettre en contact une substance à base de soie avec une solution alcaline aqueuse, à une température de 95 °C ou plus, afin de réduire sa résistance, puis à retirer l'alcali de la substance à base de soie ainsi obtenue avant de la sécher et, enfin, de la pulvériser.

Claims (3)

  1. Procédé de préparation d'une fine poudre de fibroïne de soie, dans lequel une substance à base de soie est mise en contact avec une solution aqueuse alcaline à une température de 95 °C ou plus, afin de réduire la résistance de la substance à base de soie, la substance à base de soie résultante étant ensuite soumise à une désalcalinisation, puis séchée, et dans lequel la substance à base de soie séchée résultante est ensuite finement pulvérisée, caractérisé en ce que la mise en contact de la substance à base de soie avec la solution aqueuse alcaline est réalisée en remplissant de substance à base de soie un sac fabriqué dans un matériau de type étoffe présentant une structure réticulée à petits trous et en ce que le sac contenant la substance à base de soie est plongé dans la solution aqueuse alcaline.
  2. Procédé selon la revendication 1, dans lequel la réticulation textile présente une dimension de 1 µm ou moins.
  3. Procédé selon l'une quelconque des revendications précédentes, dans lequel la pulvérisation de la substance à base de soie séchée est réalisée en broyant tout d'abord grossièrement la substance à base de soie séchée suivant une granulométrie moyenne comprise dans la gamme de 15 à 30 µm, puis en la broyant ensuite finement suivant une granulométrie moyenne comprise dans la gamme de 3 à 6 µm.
EP96901128A 1995-01-27 1996-01-26 Procede de production de poudre fine de fibroine Expired - Lifetime EP0753533B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP7031417A JP2615440B2 (ja) 1995-01-27 1995-01-27 絹フィブロイン微粉末の製造方法
JP3141795 1995-01-27
JP31417/95 1995-01-27
PCT/JP1996/000154 WO1996023020A1 (fr) 1995-01-27 1996-01-26 Procede de production de poudre fine de fibroine

Publications (3)

Publication Number Publication Date
EP0753533A1 EP0753533A1 (fr) 1997-01-15
EP0753533A4 EP0753533A4 (fr) 1999-01-20
EP0753533B1 true EP0753533B1 (fr) 2001-10-10

Family

ID=12330692

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96901128A Expired - Lifetime EP0753533B1 (fr) 1995-01-27 1996-01-26 Procede de production de poudre fine de fibroine

Country Status (7)

Country Link
US (1) US5853764A (fr)
EP (1) EP0753533B1 (fr)
JP (1) JP2615440B2 (fr)
KR (1) KR100217169B1 (fr)
CN (1) CN1078895C (fr)
DE (1) DE69615762T2 (fr)
WO (1) WO1996023020A1 (fr)

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CN1101402C (zh) * 1998-12-01 2003-02-12 浙江丝绸工学院 从茧衣、茧壳、废丝中提取的丝胶多肽及方法
CN1099424C (zh) * 1998-12-22 2003-01-22 金明官 丝素肽的催化循环制备法
JP3362778B2 (ja) * 1999-06-03 2003-01-07 独立行政法人農業生物資源研究所 結晶性絹超微粉末の製造方法
JP3505677B2 (ja) * 1999-07-12 2004-03-08 独立行政法人農業生物資源研究所 結晶性絹超微粉末を含有する化粧料
JP4570188B2 (ja) * 1999-11-24 2010-10-27 独立行政法人 日本原子力研究開発機構 絹繊維を微粉末化及び水溶化する方法
KR100330550B1 (ko) * 1999-12-27 2002-03-28 임건빈 실크 피브로인 분말의 제조방법
KR100431669B1 (ko) * 2000-12-29 2004-05-17 김진국 누에고치로부터 제조된 분말, 그 제조방법 및 용도
KR100420824B1 (ko) * 2001-06-21 2004-03-02 배도규 실크를 이용하여 제조한 실크 펩타이드와 피브로인 분말물질 및 그 제조방법
US7297678B2 (en) * 2003-03-12 2007-11-20 Genencor International, Inc. Use of repeat sequence protein polymers in personal care compositions
US7314851B2 (en) * 2003-12-11 2008-01-01 The Foundation for the Promotion of Supplementary Occupations and Related Techniques of her Majesty Queen Sirikit Silk soap comprising sericin protein
CN1243059C (zh) * 2004-03-04 2006-02-22 苏州大学 纳米丝素颗粒的制造方法
CN1620887B (zh) * 2004-12-15 2010-05-12 汤兴然 食用无脂肪动物蛋白及其制备方法和应用
US7751985B2 (en) * 2006-12-14 2010-07-06 The Hong Kong Polytechnic University Process for preparing silk polypeptide in a controllable particle size
JPWO2010113798A1 (ja) * 2009-03-30 2012-10-11 学校法人福岡大学 コーティング絹微粒子およびその製造方法
US9925301B2 (en) * 2012-04-06 2018-03-27 Trustees Of Tufts College Methods of producing and using silk microfibers
CN103387598B (zh) * 2012-05-11 2016-05-11 香港纺织及成衣研发中心有限公司 多肽材料及其制备方法以及采用其整理纺织品的方法
ES2718653T3 (es) 2012-06-26 2019-07-03 Al Pre Tec Srl Allergy Prevention Tech Italia Método para producir polvo de fibroína a partir de productos o filamentos de seda
CN104936978B (zh) 2013-04-25 2020-01-21 丝芭博株式会社 多肽多孔质体及其制造方法
CN104936979B (zh) 2013-04-25 2020-02-21 丝芭博株式会社 多肽颗粒及其制造方法
CN104936625A (zh) 2013-04-25 2015-09-23 丝芭博株式会社 多肽水凝胶及其制造方法
CN103739691B (zh) * 2013-12-11 2016-04-20 浙江大学 一种绿色环保制备丝素蛋白粉末的方法
JP2016216522A (ja) * 2015-05-14 2016-12-22 国立研究開発法人理化学研究所 成形品、フィルム、及び熱変形の抑制方法
BR112018008202A2 (pt) 2015-11-03 2018-10-23 Colgate Palmolive Co cerdas e escova de dentes incorporando as mesmas
MX2021006436A (es) 2018-12-10 2021-09-14 Cambridge Crops Inc Composiciones y metodos para la extension de la vida util a base de polimero.
JP7694006B2 (ja) * 2020-06-16 2025-06-18 セイコーエプソン株式会社 繭糸成形体、繭糸成形体の製造方法、セルロース繊維再生成形体の製造方法
CN112266490B (zh) * 2020-10-29 2021-11-30 之江实验室 一种利用湿膜涂覆法制备蚕丝蛋白薄膜的方法
US11976196B2 (en) 2021-04-14 2024-05-07 Cambridge Crops, Inc. Silk packaging applications
US11584784B2 (en) 2021-05-21 2023-02-21 Cambridge Crops, Inc. Systems and methods for manufacturing a silk fibroin solution and powders containing silk fibroin
US11864569B2 (en) 2021-08-16 2024-01-09 Cambridge Crops, Inc. Systems and methods for improving the performance of cereal using a silk fibroin solution and powders containing silk fibroin
FR3142886A1 (fr) * 2022-12-09 2024-06-14 Benu Blanc Composition cosmetique/dermatologique

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JPS5838449B2 (ja) * 1979-04-17 1983-08-23 カネボウ株式会社 微粉末状絹フィプロインの製造法
JPS5845232A (ja) * 1981-09-14 1983-03-16 Kikkoman Corp 絹フイブロイン粉末の製造法
JPS6455191A (en) * 1987-08-27 1989-03-02 Norinsuisansho Sanshi Shikenjo Production of ultrafine powder of silk protein
JPH0670308B2 (ja) * 1991-03-20 1994-09-07 トスコ株式会社 合成皮革の風合い及び機能を改質するために用いる絹微粉末及びその製造方法
JP2601779B2 (ja) * 1991-05-13 1997-04-16 鐘紡株式会社 微粉体状改質シルクパウダー水分散液の製造法及び微粉体状改質シルクパウダーの製造法
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JPH064679A (ja) * 1992-06-24 1994-01-14 Toshiba Corp イメージ処理装置

Also Published As

Publication number Publication date
EP0753533A4 (fr) 1999-01-20
WO1996023020A1 (fr) 1996-08-01
KR100217169B1 (ko) 1999-09-01
CN1078895C (zh) 2002-02-06
US5853764A (en) 1998-12-29
KR970702315A (ko) 1997-05-13
CN1150438A (zh) 1997-05-21
DE69615762D1 (de) 2001-11-15
JP2615440B2 (ja) 1997-05-28
DE69615762T2 (de) 2002-08-08
EP0753533A1 (fr) 1997-01-15
JPH08198970A (ja) 1996-08-06

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